Yamaha TRBX600 series basses are all about the balance of elements. The TRBX604FM 4-string and TRBX605FM 5-string feature the punchy tone of a 3D-sculpted body constructed of an alder/maple laminate and the power of a Yamaha active/passive preamp with 3-band EQ. A flame maple top provides timeless looks, while the 5-piece maple/mahogany neck contributes stability and sustain.